Finite element stress analysis and fatigue behavior of cast circumferential clasps

Sandu, Liliana; Faur, Nicolae; Borţun, Cristina Maria

doi:10.1016/j.prosdent.2006.11.003

Cited by 25 publications

(31 citation statements)

References 14 publications

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“…8,[19][20][21] The mechanical property, such as elastic modulus and bending yield strength, is crucial for RPD because it prevents clasps, the retentive element of RPD, from catastrophic failure during the repetitive cycles of insertion and removal of the dentures from the mouth. 22,23 However, there is no data currently available on fatigue resistance of laser-sintered RPD alloys. Previous studies evaluated the physical properties including microstructure, corrosion resistance, and solubility of laser-sintered Co-Cr alloys for other applications.…”

Section: Introductionmentioning

confidence: 99%

Removable partial denture alloys processed by laser‐sintering technique

et al. 2017

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Removable partial dentures (RPDs) are traditionally made using a casting technique. New additive manufacturing processes based on laser sintering has been developed for quick fabrication of RPDs metal frameworks at low cost. The objective of this study was to characterize the mechanical, physical, and biocompatibility properties of RPD cobalt-chromium (Co-Cr) alloys produced by two laser-sintering systems and compare them to those prepared using traditional casting methods. The laser-sintered Co-Cr alloys were processed by the selective laser-sintering method (SLS) and the direct metal laser-sintering (DMLS) method using the Phenix system (L-1) and EOS system (L-2), respectively. L-1 and L-2 techniques were 8 and 3.5 times more precise than the casting (CC) technique (p < 0.05). Co-Cr alloys processed by L-1 and L-2 showed higher (p < 0.05) hardness (14-19%), yield strength (10-13%), and fatigue resistance (71-72%) compared to CC alloys. This was probably due to their smaller grain size and higher microstructural homogeneity. All Co-Cr alloys exhibited low porosity (2.1-3.3%); however, pore distribution was more homogenous in L-1 and L-2 alloys when compared to CC alloys. Both laser-sintered and cast alloys were biocompatible. In conclusion, laser-sintered alloys are more precise and present better mechanical and fatigue properties than cast alloys for RPDs. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 1174-1185, 2018.

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Section: Introductionmentioning

confidence: 99%

Removable partial denture alloys processed by laser‐sintering technique

et al. 2017

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“…Three retentive tip models were designed taking into consideration the physical characteristics of Co -Cr (Wironit LA; Bego, Bremen, Germany), Ti -6Al -7Nb (Talloy Tough; GC Dental Industrial Corp., Tokyo, Japan) and Type IV Au (Degulor M; Degussa, Germany) alloys (Mahmoud et al 2005;Sandu et al 2007; Table 2). All alloys were presumed to be linear elastic, homogenous and isotropic (Papavasiliou et al 1996;Meyer et al 2001;Tada et al 2003).…”

Section: Methodsmentioning

confidence: 99%

Finite element analysis of stress distribution on modified retentive tips of bar clasp

Oyar

Soyarslan²,

Can³

et al. 2012

Computer Methods in Biomechanics and Biomedical Engineering

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This study used finite element analysis to evaluate the retentive tips of bar clasps made from different alloys and using different designs in order to determine whether or not different materials and tip forms are suitable for bar clasp applications. Co-Cr, Ti and Type IV Au alloys were selected based on their physical and mechanical properties. The 3D finite element models of three different bar clasp retentive tip geometries prepared from Co-Cr, Ti and Type IV Au alloys were constructed using the finite element software package MSC.Marc. Analysis of a concentrated load of 5 N applied to the removable partial denture approach arms in an occlusal direction was performed. Although stress distribution and localisation within bar clasps with different retentive tips were observed to be similar and were concentrated in the approach arm, stress intensities differed in all models.

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“…Outra simplificação realizada diz respeito aos dentes, que são trabalhados como um todo, não importando as diferenças entre polpa, dentina, cemento e esmalte (Rubin et al, 1982;Lotti et al, 2006). Não é considerado o osso trabecular neste estudo, uma vez que a diferenciação entre o osso cortical e osso trabecular não causa grandes alterações nos resultados em análise de elementos finitos (Lotti et al, 2006;Zhao et al, 2008 (Barbosa;Soares, 2008;Cattaneo et al, 2003;Gao et al, 2006;Kibi et al, 2009;Moroi et al, 1993;Rubin et al, 1982;Sato et al, 2000;Sandu et al, 2007;Sun et al, 2008;Ujigawa et al, 2007;Yang;Xiang, 2007;Saab et al, 2007;Zhao et al, 2008).…”

Section: Discussionunclassified

“…Porém, a exatidão in vivo dessas propriedades não está muito bem elucidada. Por esse motivo, a grande maioria das análises considera os materiais com propriedades elásticas lineares, onde as deformações da estrutura são diretamente proporcionais às forças aplicadas (Moroi et al, 1993;Sato et al, 2000;Barbosa;Soares, 2008;Cattaneo et al, 2003;Gao et al, 2006;Saab et al, 2007;Sandu et al, 2007;Ujigawa et al, 2007;Yang;Xiang, 2007;Sun et al, 2008;Zhao et al, 2008;Kibi et al, 2009), tendo sido esta a opção considerada neste estudo.…”

Section: Discussionunclassified

“…Observando a dissipação no acrílico da prótese obturadora, no caso de Dessa maneira, os resultados apresentados indicam regiões prováveis que em condições dinâmicas, seus componentes poderiam apresentar deformações elásticas ou plásticas, sendo sujeitas à falhas por ciclagem (Bates, 1966;Vallittu;Kokkonem, 1995;Sandu et al, 2007;Cheng et al, 2010).…”

Section: Discussionunclassified

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Avaliação das tensões geradas nos componentes protéticos de próteses obturadoras maxilares classe I, II e IV de Aramany por meio de análise de elementos finitos

Miyashita¹

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Finite element stress analysis and fatigue behavior of cast circumferential clasps

Cited by 25 publications

References 14 publications

Removable partial denture alloys processed by laser‐sintering technique

Removable partial denture alloys processed by laser‐sintering technique

Finite element analysis of stress distribution on modified retentive tips of bar clasp

Avaliação das tensões geradas nos componentes protéticos de próteses obturadoras maxilares classe I, II e IV de Aramany por meio de análise de elementos finitos

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